The error: You cannot format this volume
“I was trying to format system drive C like I formatted other partitions after double
clicking This PC on my Windows 10. Right clicked the C drive and selected
Format…only to get following prompt: You cannot format this volume. It contains the
version of Windows that you are using. Formatting this volume could cause your
computer to stop working. I’m confused. It offers a Formatting disks and drives FAQ
link, after I clicked into, Windows gives me many Q & A and a lot of
terminologies. I cannot understand that clearly. What should I do to delete this
It is a help post on system drive formatting in Windows 10. In fact, that is a
formatting error that can be found in any Windows OS, Windows 8, 7, XP, and Vista.
Other similar formatting related errors in Windows would be: “Windows
cannot format the system partition on this disk” and “Windows was unable to
complete the format in Disk Management”, and “System partition is not allowed to be
formatted, format failed” in Diskpart.
Why you cannot format system drive within Windows?
According to Microsoft, that is a safety feature so that you cannot delete Windows by
accident. System partition contains the boot files that are required to boot for
Windows, such as boot.ini, Ntldr, Bootmgr and BCD.
On the other hand, system drive C is an active partition which is set as the bootable
partition that contains the operating system. Only one partition on each hard drive
can be set as an active partition and the partition cannot be formatted or deleted
within Windows environment. That implies you can do formatting without Windows
Well, how do you get out of the Windows environment? Actually, Windows gives you an
option with Windows installation disc. Don’t worry, even if you don’t have a Windows
installation disc, because another simple way about fixing you cannot format this
volume error is illustrated followed by.
How to fix you cannot format this volume in Windows?
If you’re good at practical operations, you can uninstall the disk that contains
operating system from your machine and connect it to another computer as a secondary
storage. Then, do formatting directly under Windows environment. Besides, you have
two more specific ways to format Windows system drive. Let’s get it closer.
Format system volume using Windows installation disc
To format your computer’s hard disk entirely, you can turn to Windows installation
disc. Please note that all data on the disk will be lost, so does the operating
system. Meaning, you cannot boot from this disk any more after formatting. Be
cautious. Backup files
before reformatting if any.
1. To fix you cannot format a system volume, shutdown your machine and insert Windows
installation disc. Boot from the disc. Then, you’ll see the installation interface.
Choose a language according to your situation. Click Next to
2. Click on Install now at next prompt and you’ll get into following page, where to
install. Choose the disk that contains your system drive C and press Format. During
the Setup process, you can repartition and reformat your hard disk, or maybe
Tips: by pressing Shift + F10 key combinations, you can lift command
prompt to format disk in CMD.
That is quite easy to solve unable to format C problem. However, as mentioned,
Windows installation disc will erase all files and programs on the disk. What if you
want to format system volume only? Besides, for a user who has no Windows
installation disc, above method is not doable. Fortunately, you can complete system
formatting with free formatting tool.
Format system partition in Windows PE mode
AOMEI Partition Assistant Standard is free
partition manager that will help you solve you cannot format this volume trouble
easily. Specifically, you’ll create a bootable USB drive or CD/DVD disc with WinPE
ISO file and AOMEI Partition Assistant installed. Next, boot from the bootable
device and perform formatting. You can choose format only system drive or format the
entire disk. Download and install AOMEI Partition
Assistant Standard to have a try.
1. Insert a USB drive or CD/DVD disc into your computer. Run AOMEI Partition
Assistant. Click on Make Bootable Media to create a WinPE based
bootable device. Follow the wizard to complete creating.
All data on USB drive or CD/DVD will be erased. Backup files if necessary. You can
export WinPE ISO file and make bootable media with other devices.
2. Shutdown your computer and boot it from the created boot device. You’ll find AOMEI
Partition Assistant right after you log in. Start it and right click the system
volume. Choose Format Partition from given list.
3. Edit partition label, and choose file system and cluster size. NTFS is used for
system by default. Click OK.
4. Review the result and click Apply and thenProceed to start formatting.
The formatted disk won’t be bootable after above operations. You can install
new system on that disk or use it for other purposes.
The advanced version Professional support quick partition hard drive after
Formatting is actually an easy work as long as you know how to operate correctly.
System formatting is not recommended for common user, that’s why you encounter you
cannot format this volume error in Windows 8/10/Vista/7/XP. Be sure that you know
what you’re doing.
Except for formatting system drive without Windows environment, AOMEI Partition
Assistant does many other helpful jobs. For example, you can move OS to the C
drive to overwrite all data if system migration is what you want.